HTTP状态500 - 请求处理失败;嵌套异常是org.hibernate.exception.GenericJDBCException：无法执行语句

Question

我使用Spring + MVC + Hibernate。 插入Hibernate时出现错误。

@Transactional
public Boolean DangKy(Account account) {

    Session session = sessionFactory.getCurrentSession();

    session.save(account);
    return true;
}

我的错误：

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.exception.GenericJDBCException: could not execute statement
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:948)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

感谢您的帮助。